Ultraviolet light is divided into three levels, labeled A, B and C depending on the wavelength, with C having the shortest wavelength and the most energy.

…we focused on various layers of hard-packed flood material out of the creek, and we also obtained some material up quite a ways from the creek itself on bedrock.

You’re out in the goldfields and searching for a spot that will possibly give up a gold nugget.

Your odds of going home with gold will be higher using the discrimination mode, even if you might have misread one of the targets you rejected.

My first day using my pinpointer I detected an area where the fellas’ big guns had swooped in and cleaned up all the “big gold” and I got over sixty tiny pieces of gold.

The area was mined intermittently from around 1900 to 1915, but was also mined in the late 1800s, with a total output valued at about $100,000, which is around $9.5 million at the current gold price.

The old timers typically washed these areas down to bedrock, and some areas appear terraced. I would imagine this is because these hydraulic mines were generally where the miners found old Tertiary river channels on the sides of mountains that were gold-bearing.